**1. The problem statement, all variables and given/known data**

Use the Weiss Zone Law to determine a vector which lies along the line of intersection of the (221) and (122) planes.

**2. Relevant equations**

hU+kV+lW=0

**3. The attempt at a solution**

hU+kV+lW=0

2U+2V+1W=0 eqn(1) 1U+1V+2W=0 eqn(2)

1W=(-2U-2V)

Sub into eqn (2)

1U+1V+2(-2U-2v)=0

1U+V-4U-4V=0

-3U-3V=0

3U+3V=0

U=-V

1U+1V+2w=0 eqn(2)

-V+1V+2W=0

2W=0

W=0V

V=V

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